34. A box of mass 1 kg was placed on the edge of a rotating table with radius 10 cm, as shown below. At what rotating speed, the box begins to slide away? (The coefficient of static friction between the box and table is 0.8)5ed86971982e2.jpg
(A) 32 cm/s
(B) 53 cm/s
(C) 68 cm/s
(D) 89 cm/s
(E) 98 cm/s

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統計: A(1), B(0), C(1), D(39), E(0) #2336734